Set hostname.

[Mark Rew]

List,

Does anyone know how I can set the host name of a machine after RedHat 7.3
linux has been installed?  The wrong host name was entered during the
installation and I need to reset it to the FQDN, Fully Qualified Domain Name.
I tried using:
hostname host.domain.subnet.network

But, the next time I rebooted the machine the value I entered was lost.  The
name is in the /etc/hosts file correctly.  But, the system is not finding the
correct host name during boot up.

thanks
Mark Rew